Calculate the quantity of o₂ would be required to generate 13. 0 mol of no₂ in the reaction below assuming the reaction has only 80. 0% yield. 2 no (g) + o₂ (g) → 2 no₂ (g).

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Afish fossil is found in a rock. a foot bone and tooth are found in an older layer of the same rock. what can scientists learn from the rock? a) the area changed from land to water. b) the area changed from water to land. c) the area has always been land. d) the area was once an ocean.

Apopulation of bolts has a mean thickness of 20 millimeters, with a population standard deviation of .01 millimeters. give, in millimeters, a minimum and a maximum thickness that includes 68% of the population of bolts.